* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

html,
body {
	width: 100%;
	height: 100%;
	min-width: 320px;
	max-width: 1024px;
	margin: 0 auto;
}
body{
	background: url(../img/bg.jpg) no-repeat;
	background-size: 100%;
	
}
.top{
	width:100%;
	height: 12%;
	margin-bottom: 5%;
	text-align: center;
	padding: 0 16px;
	
}
.top img{
	width: 100%;
	height: 100%;
}
.content{
	display: flex;
	display: -webkit-flex;
	display: -moz-flex;
	justify-content: center;
	-webkit-justify-content: center;
	-moz-justify-content: center;
	align-items: center;
	-webkit-align-items: center;
	-moz-align-items: center;
	width: 100%;
	height: 40%;
	margin-bottom: 10%;
}
.content-child{
	height: 100%;
}
.content-child img{
	height: 100%;
}
.download-btn{
	height: 7%;
	text-align: center;
}
.download-btn img{
	height: 100%;
}
